What is arc-gate-mcp?
arc-gate-mcp is a MCP server by 9hannahnine-jpg that runtime governance for MCP tool calls that blocks prompt injection and capability abuse before tool results reach the agent. It is listed under Security and has 2 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | 9hannahnine-jpg |
| Repository | 9hannahnine-jpg/arc-gate-mcp |
| Popularity | 2 GitHub stars |
| Category | Security |
| Security | Low risk (80/100) |
| Rank | #3,017 of 4,418 MCP servers; #150 in Security |
| Last commit | 2026-05-31 |
| Runs | Not stated |
| Language | Python |
Is arc-gate-mcp safe to install?
arc-gate-mcp scores 80/100 on the MCPMods security check: Low risk. Things to review: can take actions such as send, write or deploy. It passed 3 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Where data goes is not stated | Note |
| No credentials mentioned | Pass |
| Can take actions such as send, write or deploy | Review |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install arc-gate-mcp?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/9hannahnine-jpg/arc-gate-mcp
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add arc-gate-mcp -- <command from README> claude mcp add --transport http arc-gate-mcp <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs arc-gate-mcp for you:
Add the "arc-gate-mcp" MCP server from https://github.com/9hannahnine-jpg/arc-gate-mcp to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.